Improvement in band-saw gangs



rrED STATESPATENT FFICE.

wILLIAM J. MGLANE, oE' NEW YORK, N. Y., AssIeNoE To HIMsELE AND HENRY sILLIMAN7 or sAME PLAGE.

IMPROVEMENT IN BAND-SAW GANGS.

Specification forming part of Letters Patent No. 126,727, dated May 14,1872.

Specication describing a new and useful Improvement in Band-Saw Gangs, invented Y by WILLIAM J. MOLANE, of the city, county,

and Stateof New York.

. This invention relates to a new and useful improvementin machinery for sawing lumber and marble; and lconsists in the construction and arran gement of parts hereinafter de scribed;

In the drawing, Figure 1 represents a scc tional side elevation oi a gang of saws arranged according to my invention. Fig. 2 is a front view of the same. lIiig. 3 is a horizontal section of Fig. 2 taken on the line m x. Fig. 4 is a horizontal section taken on the line il if- Y Similar letters of reference indicate corresponding parts.

A represents the saws; B, the pulleys. These pulleys are provided with recesses C, which allow the teeth of the saws to overhang the particular pulleys to which-each saw is attached. This arrangement allows the plate of the saw to lie dat upon the pulley, and so that the set of the saw will not interfere. lhis ari rangement of the saws is seen in Figs. 3 and 4. As seen inI `ig.11,I)is the driving-shaft, and the pulleys are fast thereon, more or less in number, as maybe desired. E is the shaft, on which are the upper pulleys. This is simply an arbor, on which the upper pulleys turn. Y The upper pulleys are separate. Each revolves by itself on the arbor.

In Fig. l the manner of straining the saws is seen,`but I do not confine myself to any particular mechanism for that purpose. A turn-screw, as seen at Ii, may be used, or any other device. G G are guides t o keep the arbor in proper position. The stay II may be dispensed with altogether, or it may be 'proa vided with a screw-shank with nuts above and below, so that it may be varied in height.

I am aware that band-saws are used at the present time. I do not, therefore, claim a bandsaw, broadly, but I do claim a series of saws working in gauges, and also my Inode of ar ranging them.

The gangs maybe used either vertically, as seen in the drawing', or horizontally, or in an inclined position, as may be desired, and may be applied to sawing either wood or stone.

In the drawing pulleys are seen connected together by gear-wheels I and J; but the. pulleys may be driven entirely by belts, or in any other suitable manner.

For the purpose of increasing the diameter of the loose or upper pulleys loose sleeves may he slipped on over the ordinary pulleys. This may be done when lumber is to he sawed to a particular bend, or when, from any cause, it is desired to enlarge the lower pulleys.

Having thus described my invention, I claim as new and desire to secure by Letters Patent--V A gang of band-saws, arranged substantially as described, for the purposesset forth.

WM.` JAS. MCLANE.

Witnesses:

T. B. MosHEE, GEO. W. MABEE. 

